ERDI from SPECTRUM is capable of producing high-purity water with low conductivity values, suitable for applications where typically a water quality of 0.1 microSiemens/cm is required. This high quality mixed-bed resin consists of a strong-acid cation and strong base anion mixture for creating pure deionised water. Resin life is maximised when used as a post-polisher after a reverse osmosis system or deionisation plant, and is suitable for use in large ion-exchange units.